My Right Hand Is Icy Cold But My Left Hand

My right hand is icy cold but my left hand is normal in temperature. i have no numbness or pain in the hand or arm. I have not had an injuy to my arm or to my spine. I do not have carpal tunnel syndrome. I am right handed so it gets more use and movement than the normal left one. i am 55 years old and it has been happening every day for the past 6 months.